Pharnacology of cloned cardiac K+ channels.
نویسندگان
چکیده
منابع مشابه
Regulation of Cloned Cardiac Channels
Regulation of Cloned Cardiac Channels. (August 2005) Bharathi Balasubramanian, B.E., Madras University Co-Chairs of Advisory Committee: Dr. Charles S. Lessard Dr. Michael J. Davis Activation of a5ß1 integrin potentiates L-type calcium current in vascular smooth muscle, which is partly mediated by tyrosine phoshorylation of the a1c channel subunit. Expressed rabbit VSM and neuronal isoforms are ...
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ATP-sensitive K(+) (K(ATP)) channels may be regulated by protons in addition to ATP, phospholipids, and other nucleotides. Such regulation allows a control of cellular excitability in conditions when pH is low but ATP concentration is normal. However, whether the K(ATP) changes its activity with pH alterations remains uncertain. In this study we showed that the reconstituted K(ATP) was strongly...
متن کاملSusceptibility of cloned K+ channels to reactive oxygen species.
Free radical-induced oxidant stress has been implicated in a number of physiological and pathophysiological states including ischemia and reperfusion-induced dysrhythmia in the heart, apoptosis of T lymphocytes, phagocytosis, and neurodegeneration. We have studied the effects of oxidant stress on the native K+ channel from T lymphocytes and on K+ channels cloned from cardiac, brain, and T-lymph...
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The effects of ranolazine, an antianginal drug, on potassium channel Kv4.3 were examined by using the whole-cell patch-clamp technique. Ranolazine inhibited the peak amplitude of Kv4.3 in a reversible, concentration-dependent manner with an IC(50) of 128.31 μM. The activation kinetics were not significantly affected by ranolazine at concentrations up to 100 μM. Applications of 10 and 30 μM rano...
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The effects of strontium (Sr2+; 7-50 mM) on five different cloned rat K channels (Kv1.1, Kv1.5, Kv1.6, Kv2.1, and Kv3.4), expressed in oocytes of Xenopus laevis, were investigated with a two-electrode voltage clamp technique. The main effect was a shift of the Gk(V) curve along the potential axis, different in size for the different channels. Kv1.1 was shifted most and Kv3.4 least, 21 and 8 mV,...
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ژورنال
عنوان ژورنال: Japanese Journal of Electrocardiology
سال: 1995
ISSN: 1884-2437,0285-1660
DOI: 10.5105/jse.15.124